Libav
mpeg4videoenc.c
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1 /*
2  * MPEG4 encoder.
3  * Copyright (c) 2000,2001 Fabrice Bellard
4  * Copyright (c) 2002-2010 Michael Niedermayer <michaelni@gmx.at>
5  *
6  * This file is part of Libav.
7  *
8  * Libav is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * Libav is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with Libav; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 #include "libavutil/attributes.h"
24 #include "libavutil/log.h"
25 #include "libavutil/opt.h"
26 #include "mpegutils.h"
27 #include "mpegvideo.h"
28 #include "h263.h"
29 #include "mpeg4video.h"
30 
31 /* The uni_DCtab_* tables below contain unified bits+length tables to encode DC
32  * differences in mpeg4. Unified in the sense that the specification specifies
33  * this encoding in several steps. */
36 static uint16_t uni_DCtab_lum_bits[512];
37 static uint16_t uni_DCtab_chrom_bits[512];
38 
39 /* Unified encoding tables for run length encoding of coefficients.
40  * Unified in the sense that the specification specifies the encoding in several steps. */
41 static uint32_t uni_mpeg4_intra_rl_bits[64 * 64 * 2 * 2];
42 static uint8_t uni_mpeg4_intra_rl_len[64 * 64 * 2 * 2];
43 static uint32_t uni_mpeg4_inter_rl_bits[64 * 64 * 2 * 2];
44 static uint8_t uni_mpeg4_inter_rl_len[64 * 64 * 2 * 2];
45 
46 //#define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 + (run) * 256 + (level))
47 //#define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 * 64 + (run) + (level) * 64)
48 #define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 * 64 + (run) * 128 + (level))
49 
50 /* mpeg4
51  * inter
52  * max level: 24/6
53  * max run: 53/63
54  *
55  * intra
56  * max level: 53/16
57  * max run: 29/41
58  */
59 
64 static inline int get_block_rate(MpegEncContext *s, int16_t block[64],
65  int block_last_index, uint8_t scantable[64])
66 {
67  int last = 0;
68  int j;
69  int rate = 0;
70 
71  for (j = 1; j <= block_last_index; j++) {
72  const int index = scantable[j];
73  int level = block[index];
74  if (level) {
75  level += 64;
76  if ((level & (~127)) == 0) {
77  if (j < block_last_index)
78  rate += s->intra_ac_vlc_length[UNI_AC_ENC_INDEX(j - last - 1, level)];
79  else
80  rate += s->intra_ac_vlc_last_length[UNI_AC_ENC_INDEX(j - last - 1, level)];
81  } else
82  rate += s->ac_esc_length;
83 
84  last = j;
85  }
86  }
87 
88  return rate;
89 }
90 
99 static inline void restore_ac_coeffs(MpegEncContext *s, int16_t block[6][64],
100  const int dir[6], uint8_t *st[6],
101  const int zigzag_last_index[6])
102 {
103  int i, n;
104  memcpy(s->block_last_index, zigzag_last_index, sizeof(int) * 6);
105 
106  for (n = 0; n < 6; n++) {
107  int16_t *ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
108 
109  st[n] = s->intra_scantable.permutated;
110  if (dir[n]) {
111  /* top prediction */
112  for (i = 1; i < 8; i++)
113  block[n][s->idsp.idct_permutation[i]] = ac_val[i + 8];
114  } else {
115  /* left prediction */
116  for (i = 1; i < 8; i++)
117  block[n][s->idsp.idct_permutation[i << 3]] = ac_val[i];
118  }
119  }
120 }
121 
130 static inline int decide_ac_pred(MpegEncContext *s, int16_t block[6][64],
131  const int dir[6], uint8_t *st[6],
132  int zigzag_last_index[6])
133 {
134  int score = 0;
135  int i, n;
136  int8_t *const qscale_table = s->current_picture.qscale_table;
137 
138  memcpy(zigzag_last_index, s->block_last_index, sizeof(int) * 6);
139 
140  for (n = 0; n < 6; n++) {
141  int16_t *ac_val, *ac_val1;
142 
143  score -= get_block_rate(s, block[n], s->block_last_index[n],
145 
146  ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
147  ac_val1 = ac_val;
148  if (dir[n]) {
149  const int xy = s->mb_x + s->mb_y * s->mb_stride - s->mb_stride;
150  /* top prediction */
151  ac_val -= s->block_wrap[n] * 16;
152  if (s->mb_y == 0 || s->qscale == qscale_table[xy] || n == 2 || n == 3) {
153  /* same qscale */
154  for (i = 1; i < 8; i++) {
155  const int level = block[n][s->idsp.idct_permutation[i]];
156  block[n][s->idsp.idct_permutation[i]] = level - ac_val[i + 8];
157  ac_val1[i] = block[n][s->idsp.idct_permutation[i << 3]];
158  ac_val1[i + 8] = level;
159  }
160  } else {
161  /* different qscale, we must rescale */
162  for (i = 1; i < 8; i++) {
163  const int level = block[n][s->idsp.idct_permutation[i]];
164  block[n][s->idsp.idct_permutation[i]] = level - ROUNDED_DIV(ac_val[i + 8] * qscale_table[xy], s->qscale);
165  ac_val1[i] = block[n][s->idsp.idct_permutation[i << 3]];
166  ac_val1[i + 8] = level;
167  }
168  }
169  st[n] = s->intra_h_scantable.permutated;
170  } else {
171  const int xy = s->mb_x - 1 + s->mb_y * s->mb_stride;
172  /* left prediction */
173  ac_val -= 16;
174  if (s->mb_x == 0 || s->qscale == qscale_table[xy] || n == 1 || n == 3) {
175  /* same qscale */
176  for (i = 1; i < 8; i++) {
177  const int level = block[n][s->idsp.idct_permutation[i << 3]];
178  block[n][s->idsp.idct_permutation[i << 3]] = level - ac_val[i];
179  ac_val1[i] = level;
180  ac_val1[i + 8] = block[n][s->idsp.idct_permutation[i]];
181  }
182  } else {
183  /* different qscale, we must rescale */
184  for (i = 1; i < 8; i++) {
185  const int level = block[n][s->idsp.idct_permutation[i << 3]];
186  block[n][s->idsp.idct_permutation[i << 3]] = level - ROUNDED_DIV(ac_val[i] * qscale_table[xy], s->qscale);
187  ac_val1[i] = level;
188  ac_val1[i + 8] = block[n][s->idsp.idct_permutation[i]];
189  }
190  }
191  st[n] = s->intra_v_scantable.permutated;
192  }
193 
194  for (i = 63; i > 0; i--) // FIXME optimize
195  if (block[n][st[n][i]])
196  break;
197  s->block_last_index[n] = i;
198 
199  score += get_block_rate(s, block[n], s->block_last_index[n], st[n]);
200  }
201 
202  if (score < 0) {
203  return 1;
204  } else {
205  restore_ac_coeffs(s, block, dir, st, zigzag_last_index);
206  return 0;
207  }
208 }
209 
214 {
215  int i;
216  int8_t *const qscale_table = s->current_picture.qscale_table;
217 
219 
220  if (s->pict_type == AV_PICTURE_TYPE_B) {
221  int odd = 0;
222  /* ok, come on, this isn't funny anymore, there's more code for
223  * handling this mpeg4 mess than for the actual adaptive quantization */
224 
225  for (i = 0; i < s->mb_num; i++) {
226  int mb_xy = s->mb_index2xy[i];
227  odd += qscale_table[mb_xy] & 1;
228  }
229 
230  if (2 * odd > s->mb_num)
231  odd = 1;
232  else
233  odd = 0;
234 
235  for (i = 0; i < s->mb_num; i++) {
236  int mb_xy = s->mb_index2xy[i];
237  if ((qscale_table[mb_xy] & 1) != odd)
238  qscale_table[mb_xy]++;
239  if (qscale_table[mb_xy] > 31)
240  qscale_table[mb_xy] = 31;
241  }
242 
243  for (i = 1; i < s->mb_num; i++) {
244  int mb_xy = s->mb_index2xy[i];
245  if (qscale_table[mb_xy] != qscale_table[s->mb_index2xy[i - 1]] &&
246  (s->mb_type[mb_xy] & CANDIDATE_MB_TYPE_DIRECT)) {
247  s->mb_type[mb_xy] |= CANDIDATE_MB_TYPE_BIDIR;
248  }
249  }
250  }
251 }
252 
257 static inline void mpeg4_encode_dc(PutBitContext *s, int level, int n)
258 {
259 #if 1
260  /* DC will overflow if level is outside the [-255,255] range. */
261  level += 256;
262  if (n < 4) {
263  /* luminance */
264  put_bits(s, uni_DCtab_lum_len[level], uni_DCtab_lum_bits[level]);
265  } else {
266  /* chrominance */
268  }
269 #else
270  int size, v;
271  /* find number of bits */
272  size = 0;
273  v = abs(level);
274  while (v) {
275  v >>= 1;
276  size++;
277  }
278 
279  if (n < 4) {
280  /* luminance */
281  put_bits(&s->pb, ff_mpeg4_DCtab_lum[size][1], ff_mpeg4_DCtab_lum[size][0]);
282  } else {
283  /* chrominance */
284  put_bits(&s->pb, ff_mpeg4_DCtab_chrom[size][1], ff_mpeg4_DCtab_chrom[size][0]);
285  }
286 
287  /* encode remaining bits */
288  if (size > 0) {
289  if (level < 0)
290  level = (-level) ^ ((1 << size) - 1);
291  put_bits(&s->pb, size, level);
292  if (size > 8)
293  put_bits(&s->pb, 1, 1);
294  }
295 #endif
296 }
297 
298 static inline int mpeg4_get_dc_length(int level, int n)
299 {
300  if (n < 4)
301  return uni_DCtab_lum_len[level + 256];
302  else
303  return uni_DCtab_chrom_len[level + 256];
304 }
305 
310 static inline void mpeg4_encode_block(MpegEncContext *s,
311  int16_t *block, int n, int intra_dc,
312  uint8_t *scan_table, PutBitContext *dc_pb,
313  PutBitContext *ac_pb)
314 {
315  int i, last_non_zero;
316  uint32_t *bits_tab;
317  uint8_t *len_tab;
318  const int last_index = s->block_last_index[n];
319 
320  if (s->mb_intra) { // Note gcc (3.2.1 at least) will optimize this away
321  /* mpeg4 based DC predictor */
322  mpeg4_encode_dc(dc_pb, intra_dc, n);
323  if (last_index < 1)
324  return;
325  i = 1;
326  bits_tab = uni_mpeg4_intra_rl_bits;
327  len_tab = uni_mpeg4_intra_rl_len;
328  } else {
329  if (last_index < 0)
330  return;
331  i = 0;
332  bits_tab = uni_mpeg4_inter_rl_bits;
333  len_tab = uni_mpeg4_inter_rl_len;
334  }
335 
336  /* AC coefs */
337  last_non_zero = i - 1;
338  for (; i < last_index; i++) {
339  int level = block[scan_table[i]];
340  if (level) {
341  int run = i - last_non_zero - 1;
342  level += 64;
343  if ((level & (~127)) == 0) {
344  const int index = UNI_MPEG4_ENC_INDEX(0, run, level);
345  put_bits(ac_pb, len_tab[index], bits_tab[index]);
346  } else { // ESC3
347  put_bits(ac_pb,
348  7 + 2 + 1 + 6 + 1 + 12 + 1,
349  (3 << 23) + (3 << 21) + (0 << 20) + (run << 14) +
350  (1 << 13) + (((level - 64) & 0xfff) << 1) + 1);
351  }
352  last_non_zero = i;
353  }
354  }
355  /* if (i <= last_index) */ {
356  int level = block[scan_table[i]];
357  int run = i - last_non_zero - 1;
358  level += 64;
359  if ((level & (~127)) == 0) {
360  const int index = UNI_MPEG4_ENC_INDEX(1, run, level);
361  put_bits(ac_pb, len_tab[index], bits_tab[index]);
362  } else { // ESC3
363  put_bits(ac_pb,
364  7 + 2 + 1 + 6 + 1 + 12 + 1,
365  (3 << 23) + (3 << 21) + (1 << 20) + (run << 14) +
366  (1 << 13) + (((level - 64) & 0xfff) << 1) + 1);
367  }
368  }
369 }
370 
372  int16_t *block, int n,
373  int intra_dc, uint8_t *scan_table)
374 {
375  int i, last_non_zero;
376  uint8_t *len_tab;
377  const int last_index = s->block_last_index[n];
378  int len = 0;
379 
380  if (s->mb_intra) { // Note gcc (3.2.1 at least) will optimize this away
381  /* mpeg4 based DC predictor */
382  len += mpeg4_get_dc_length(intra_dc, n);
383  if (last_index < 1)
384  return len;
385  i = 1;
386  len_tab = uni_mpeg4_intra_rl_len;
387  } else {
388  if (last_index < 0)
389  return 0;
390  i = 0;
391  len_tab = uni_mpeg4_inter_rl_len;
392  }
393 
394  /* AC coefs */
395  last_non_zero = i - 1;
396  for (; i < last_index; i++) {
397  int level = block[scan_table[i]];
398  if (level) {
399  int run = i - last_non_zero - 1;
400  level += 64;
401  if ((level & (~127)) == 0) {
402  const int index = UNI_MPEG4_ENC_INDEX(0, run, level);
403  len += len_tab[index];
404  } else { // ESC3
405  len += 7 + 2 + 1 + 6 + 1 + 12 + 1;
406  }
407  last_non_zero = i;
408  }
409  }
410  /* if (i <= last_index) */ {
411  int level = block[scan_table[i]];
412  int run = i - last_non_zero - 1;
413  level += 64;
414  if ((level & (~127)) == 0) {
415  const int index = UNI_MPEG4_ENC_INDEX(1, run, level);
416  len += len_tab[index];
417  } else { // ESC3
418  len += 7 + 2 + 1 + 6 + 1 + 12 + 1;
419  }
420  }
421 
422  return len;
423 }
424 
425 static inline void mpeg4_encode_blocks(MpegEncContext *s, int16_t block[6][64],
426  int intra_dc[6], uint8_t **scan_table,
427  PutBitContext *dc_pb,
428  PutBitContext *ac_pb)
429 {
430  int i;
431 
432  if (scan_table) {
433  if (s->flags2 & CODEC_FLAG2_NO_OUTPUT) {
434  for (i = 0; i < 6; i++)
435  skip_put_bits(&s->pb,
436  mpeg4_get_block_length(s, block[i], i,
437  intra_dc[i], scan_table[i]));
438  } else {
439  /* encode each block */
440  for (i = 0; i < 6; i++)
441  mpeg4_encode_block(s, block[i], i,
442  intra_dc[i], scan_table[i], dc_pb, ac_pb);
443  }
444  } else {
445  if (s->flags2 & CODEC_FLAG2_NO_OUTPUT) {
446  for (i = 0; i < 6; i++)
447  skip_put_bits(&s->pb,
448  mpeg4_get_block_length(s, block[i], i, 0,
450  } else {
451  /* encode each block */
452  for (i = 0; i < 6; i++)
453  mpeg4_encode_block(s, block[i], i, 0,
454  s->intra_scantable.permutated, dc_pb, ac_pb);
455  }
456  }
457 }
458 
459 static inline int get_b_cbp(MpegEncContext *s, int16_t block[6][64],
460  int motion_x, int motion_y, int mb_type)
461 {
462  int cbp = 0, i;
463 
464  if (s->mpv_flags & FF_MPV_FLAG_CBP_RD) {
465  int score = 0;
466  const int lambda = s->lambda2 >> (FF_LAMBDA_SHIFT - 6);
467 
468  for (i = 0; i < 6; i++) {
469  if (s->coded_score[i] < 0) {
470  score += s->coded_score[i];
471  cbp |= 1 << (5 - i);
472  }
473  }
474 
475  if (cbp) {
476  int zero_score = -6;
477  if ((motion_x | motion_y | s->dquant | mb_type) == 0)
478  zero_score -= 4; // 2 * MV + mb_type + cbp bit
479 
480  zero_score *= lambda;
481  if (zero_score <= score)
482  cbp = 0;
483  }
484 
485  for (i = 0; i < 6; i++) {
486  if (s->block_last_index[i] >= 0 && ((cbp >> (5 - i)) & 1) == 0) {
487  s->block_last_index[i] = -1;
488  s->bdsp.clear_block(s->block[i]);
489  }
490  }
491  } else {
492  for (i = 0; i < 6; i++) {
493  if (s->block_last_index[i] >= 0)
494  cbp |= 1 << (5 - i);
495  }
496  }
497  return cbp;
498 }
499 
500 // FIXME this is duplicated to h263.c
501 static const int dquant_code[5] = { 1, 0, 9, 2, 3 };
502 
503 void ff_mpeg4_encode_mb(MpegEncContext *s, int16_t block[6][64],
504  int motion_x, int motion_y)
505 {
506  int cbpc, cbpy, pred_x, pred_y;
507  PutBitContext *const pb2 = s->data_partitioning ? &s->pb2 : &s->pb;
508  PutBitContext *const tex_pb = s->data_partitioning && s->pict_type != AV_PICTURE_TYPE_B ? &s->tex_pb : &s->pb;
509  PutBitContext *const dc_pb = s->data_partitioning && s->pict_type != AV_PICTURE_TYPE_I ? &s->pb2 : &s->pb;
510  const int interleaved_stats = (s->flags & CODEC_FLAG_PASS1) && !s->data_partitioning ? 1 : 0;
511 
512  if (!s->mb_intra) {
513  int i, cbp;
514 
515  if (s->pict_type == AV_PICTURE_TYPE_B) {
516  /* convert from mv_dir to type */
517  static const int mb_type_table[8] = { -1, 3, 2, 1, -1, -1, -1, 0 };
518  int mb_type = mb_type_table[s->mv_dir];
519 
520  if (s->mb_x == 0) {
521  for (i = 0; i < 2; i++)
522  s->last_mv[i][0][0] =
523  s->last_mv[i][0][1] =
524  s->last_mv[i][1][0] =
525  s->last_mv[i][1][1] = 0;
526  }
527 
528  assert(s->dquant >= -2 && s->dquant <= 2);
529  assert((s->dquant & 1) == 0);
530  assert(mb_type >= 0);
531 
532  /* nothing to do if this MB was skipped in the next P Frame */
533  if (s->next_picture.mbskip_table[s->mb_y * s->mb_stride + s->mb_x]) { // FIXME avoid DCT & ...
534  s->skip_count++;
535  s->mv[0][0][0] =
536  s->mv[0][0][1] =
537  s->mv[1][0][0] =
538  s->mv[1][0][1] = 0;
539  s->mv_dir = MV_DIR_FORWARD; // doesn't matter
540  s->qscale -= s->dquant;
541 // s->mb_skipped = 1;
542 
543  return;
544  }
545 
546  cbp = get_b_cbp(s, block, motion_x, motion_y, mb_type);
547 
548  if ((cbp | motion_x | motion_y | mb_type) == 0) {
549  /* direct MB with MV={0,0} */
550  assert(s->dquant == 0);
551 
552  put_bits(&s->pb, 1, 1); /* mb not coded modb1=1 */
553 
554  if (interleaved_stats) {
555  s->misc_bits++;
556  s->last_bits++;
557  }
558  s->skip_count++;
559  return;
560  }
561 
562  put_bits(&s->pb, 1, 0); /* mb coded modb1=0 */
563  put_bits(&s->pb, 1, cbp ? 0 : 1); /* modb2 */ // FIXME merge
564  put_bits(&s->pb, mb_type + 1, 1); // this table is so simple that we don't need it :)
565  if (cbp)
566  put_bits(&s->pb, 6, cbp);
567 
568  if (cbp && mb_type) {
569  if (s->dquant)
570  put_bits(&s->pb, 2, (s->dquant >> 2) + 3);
571  else
572  put_bits(&s->pb, 1, 0);
573  } else
574  s->qscale -= s->dquant;
575 
576  if (!s->progressive_sequence) {
577  if (cbp)
578  put_bits(&s->pb, 1, s->interlaced_dct);
579  if (mb_type) // not direct mode
580  put_bits(&s->pb, 1, s->mv_type == MV_TYPE_FIELD);
581  }
582 
583  if (interleaved_stats)
584  s->misc_bits += get_bits_diff(s);
585 
586  if (!mb_type) {
587  assert(s->mv_dir & MV_DIRECT);
588  ff_h263_encode_motion_vector(s, motion_x, motion_y, 1);
589  s->b_count++;
590  s->f_count++;
591  } else {
592  assert(mb_type > 0 && mb_type < 4);
593  if (s->mv_type != MV_TYPE_FIELD) {
594  if (s->mv_dir & MV_DIR_FORWARD) {
596  s->mv[0][0][0] - s->last_mv[0][0][0],
597  s->mv[0][0][1] - s->last_mv[0][0][1],
598  s->f_code);
599  s->last_mv[0][0][0] =
600  s->last_mv[0][1][0] = s->mv[0][0][0];
601  s->last_mv[0][0][1] =
602  s->last_mv[0][1][1] = s->mv[0][0][1];
603  s->f_count++;
604  }
605  if (s->mv_dir & MV_DIR_BACKWARD) {
607  s->mv[1][0][0] - s->last_mv[1][0][0],
608  s->mv[1][0][1] - s->last_mv[1][0][1],
609  s->b_code);
610  s->last_mv[1][0][0] =
611  s->last_mv[1][1][0] = s->mv[1][0][0];
612  s->last_mv[1][0][1] =
613  s->last_mv[1][1][1] = s->mv[1][0][1];
614  s->b_count++;
615  }
616  } else {
617  if (s->mv_dir & MV_DIR_FORWARD) {
618  put_bits(&s->pb, 1, s->field_select[0][0]);
619  put_bits(&s->pb, 1, s->field_select[0][1]);
620  }
621  if (s->mv_dir & MV_DIR_BACKWARD) {
622  put_bits(&s->pb, 1, s->field_select[1][0]);
623  put_bits(&s->pb, 1, s->field_select[1][1]);
624  }
625  if (s->mv_dir & MV_DIR_FORWARD) {
626  for (i = 0; i < 2; i++) {
628  s->mv[0][i][0] - s->last_mv[0][i][0],
629  s->mv[0][i][1] - s->last_mv[0][i][1] / 2,
630  s->f_code);
631  s->last_mv[0][i][0] = s->mv[0][i][0];
632  s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
633  }
634  s->f_count++;
635  }
636  if (s->mv_dir & MV_DIR_BACKWARD) {
637  for (i = 0; i < 2; i++) {
639  s->mv[1][i][0] - s->last_mv[1][i][0],
640  s->mv[1][i][1] - s->last_mv[1][i][1] / 2,
641  s->b_code);
642  s->last_mv[1][i][0] = s->mv[1][i][0];
643  s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
644  }
645  s->b_count++;
646  }
647  }
648  }
649 
650  if (interleaved_stats)
651  s->mv_bits += get_bits_diff(s);
652 
653  mpeg4_encode_blocks(s, block, NULL, NULL, NULL, &s->pb);
654 
655  if (interleaved_stats)
656  s->p_tex_bits += get_bits_diff(s);
657  } else { /* s->pict_type==AV_PICTURE_TYPE_B */
658  cbp = get_p_cbp(s, block, motion_x, motion_y);
659 
660  if ((cbp | motion_x | motion_y | s->dquant) == 0 &&
661  s->mv_type == MV_TYPE_16X16) {
662  /* check if the B frames can skip it too, as we must skip it
663  * if we skip here why didn't they just compress
664  * the skip-mb bits instead of reusing them ?! */
665  if (s->max_b_frames > 0) {
666  int i;
667  int x, y, offset;
668  uint8_t *p_pic;
669 
670  x = s->mb_x * 16;
671  y = s->mb_y * 16;
672  if (x + 16 > s->width)
673  x = s->width - 16;
674  if (y + 16 > s->height)
675  y = s->height - 16;
676 
677  offset = x + y * s->linesize;
678  p_pic = s->new_picture.f->data[0] + offset;
679 
680  s->mb_skipped = 1;
681  for (i = 0; i < s->max_b_frames; i++) {
682  uint8_t *b_pic;
683  int diff;
684  Picture *pic = s->reordered_input_picture[i + 1];
685 
686  if (!pic || pic->f->pict_type != AV_PICTURE_TYPE_B)
687  break;
688 
689  b_pic = pic->f->data[0] + offset;
690  if (!pic->shared)
691  b_pic += INPLACE_OFFSET;
692  diff = s->mecc.sad[0](NULL, p_pic, b_pic, s->linesize, 16);
693  if (diff > s->qscale * 70) { // FIXME check that 70 is optimal
694  s->mb_skipped = 0;
695  break;
696  }
697  }
698  } else
699  s->mb_skipped = 1;
700 
701  if (s->mb_skipped == 1) {
702  /* skip macroblock */
703  put_bits(&s->pb, 1, 1);
704 
705  if (interleaved_stats) {
706  s->misc_bits++;
707  s->last_bits++;
708  }
709  s->skip_count++;
710 
711  return;
712  }
713  }
714 
715  put_bits(&s->pb, 1, 0); /* mb coded */
716  cbpc = cbp & 3;
717  cbpy = cbp >> 2;
718  cbpy ^= 0xf;
719  if (s->mv_type == MV_TYPE_16X16) {
720  if (s->dquant)
721  cbpc += 8;
722  put_bits(&s->pb,
725 
726  put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
727  if (s->dquant)
728  put_bits(pb2, 2, dquant_code[s->dquant + 2]);
729 
730  if (!s->progressive_sequence) {
731  if (cbp)
732  put_bits(pb2, 1, s->interlaced_dct);
733  put_bits(pb2, 1, 0);
734  }
735 
736  if (interleaved_stats)
737  s->misc_bits += get_bits_diff(s);
738 
739  /* motion vectors: 16x16 mode */
740  ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
741 
743  motion_x - pred_x,
744  motion_y - pred_y,
745  s->f_code);
746  } else if (s->mv_type == MV_TYPE_FIELD) {
747  if (s->dquant)
748  cbpc += 8;
749  put_bits(&s->pb,
752 
753  put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
754  if (s->dquant)
755  put_bits(pb2, 2, dquant_code[s->dquant + 2]);
756 
757  assert(!s->progressive_sequence);
758  if (cbp)
759  put_bits(pb2, 1, s->interlaced_dct);
760  put_bits(pb2, 1, 1);
761 
762  if (interleaved_stats)
763  s->misc_bits += get_bits_diff(s);
764 
765  /* motion vectors: 16x8 interlaced mode */
766  ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
767  pred_y /= 2;
768 
769  put_bits(&s->pb, 1, s->field_select[0][0]);
770  put_bits(&s->pb, 1, s->field_select[0][1]);
771 
773  s->mv[0][0][0] - pred_x,
774  s->mv[0][0][1] - pred_y,
775  s->f_code);
777  s->mv[0][1][0] - pred_x,
778  s->mv[0][1][1] - pred_y,
779  s->f_code);
780  } else {
781  assert(s->mv_type == MV_TYPE_8X8);
782  put_bits(&s->pb,
783  ff_h263_inter_MCBPC_bits[cbpc + 16],
784  ff_h263_inter_MCBPC_code[cbpc + 16]);
785  put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
786 
787  if (!s->progressive_sequence && cbp)
788  put_bits(pb2, 1, s->interlaced_dct);
789 
790  if (interleaved_stats)
791  s->misc_bits += get_bits_diff(s);
792 
793  for (i = 0; i < 4; i++) {
794  /* motion vectors: 8x8 mode*/
795  ff_h263_pred_motion(s, i, 0, &pred_x, &pred_y);
796 
798  s->current_picture.motion_val[0][s->block_index[i]][0] - pred_x,
799  s->current_picture.motion_val[0][s->block_index[i]][1] - pred_y,
800  s->f_code);
801  }
802  }
803 
804  if (interleaved_stats)
805  s->mv_bits += get_bits_diff(s);
806 
807  mpeg4_encode_blocks(s, block, NULL, NULL, NULL, tex_pb);
808 
809  if (interleaved_stats)
810  s->p_tex_bits += get_bits_diff(s);
811 
812  s->f_count++;
813  }
814  } else {
815  int cbp;
816  int dc_diff[6]; // dc values with the dc prediction subtracted
817  int dir[6]; // prediction direction
818  int zigzag_last_index[6];
819  uint8_t *scan_table[6];
820  int i;
821 
822  for (i = 0; i < 6; i++)
823  dc_diff[i] = ff_mpeg4_pred_dc(s, i, block[i][0], &dir[i], 1);
824 
825  if (s->flags & CODEC_FLAG_AC_PRED) {
826  s->ac_pred = decide_ac_pred(s, block, dir, scan_table, zigzag_last_index);
827  } else {
828  for (i = 0; i < 6; i++)
829  scan_table[i] = s->intra_scantable.permutated;
830  }
831 
832  /* compute cbp */
833  cbp = 0;
834  for (i = 0; i < 6; i++)
835  if (s->block_last_index[i] >= 1)
836  cbp |= 1 << (5 - i);
837 
838  cbpc = cbp & 3;
839  if (s->pict_type == AV_PICTURE_TYPE_I) {
840  if (s->dquant)
841  cbpc += 4;
842  put_bits(&s->pb,
845  } else {
846  if (s->dquant)
847  cbpc += 8;
848  put_bits(&s->pb, 1, 0); /* mb coded */
849  put_bits(&s->pb,
850  ff_h263_inter_MCBPC_bits[cbpc + 4],
851  ff_h263_inter_MCBPC_code[cbpc + 4]);
852  }
853  put_bits(pb2, 1, s->ac_pred);
854  cbpy = cbp >> 2;
855  put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
856  if (s->dquant)
857  put_bits(dc_pb, 2, dquant_code[s->dquant + 2]);
858 
859  if (!s->progressive_sequence)
860  put_bits(dc_pb, 1, s->interlaced_dct);
861 
862  if (interleaved_stats)
863  s->misc_bits += get_bits_diff(s);
864 
865  mpeg4_encode_blocks(s, block, dc_diff, scan_table, dc_pb, tex_pb);
866 
867  if (interleaved_stats)
868  s->i_tex_bits += get_bits_diff(s);
869  s->i_count++;
870 
871  /* restore ac coeffs & last_index stuff
872  * if we messed them up with the prediction */
873  if (s->ac_pred)
874  restore_ac_coeffs(s, block, dir, scan_table, zigzag_last_index);
875  }
876 }
877 
882 {
883  int length;
884  put_bits(pbc, 1, 0);
885  length = (-put_bits_count(pbc)) & 7;
886  if (length)
887  put_bits(pbc, length, (1 << length) - 1);
888 }
889 
890 /* must be called before writing the header */
892 {
893  if (s->pict_type == AV_PICTURE_TYPE_B) {
895  } else {
896  s->last_time_base = s->time_base;
897  s->time_base = s->time / s->avctx->time_base.den;
898  }
899 }
900 
902 {
903  int hours, minutes, seconds;
904  int64_t time;
905 
906  put_bits(&s->pb, 16, 0);
907  put_bits(&s->pb, 16, GOP_STARTCODE);
908 
909  time = s->current_picture_ptr->f->pts;
910  if (s->reordered_input_picture[1])
911  time = FFMIN(time, s->reordered_input_picture[1]->f->pts);
912  time = time * s->avctx->time_base.num;
913 
914  seconds = time / s->avctx->time_base.den;
915  minutes = seconds / 60;
916  seconds %= 60;
917  hours = minutes / 60;
918  minutes %= 60;
919  hours %= 24;
920 
921  put_bits(&s->pb, 5, hours);
922  put_bits(&s->pb, 6, minutes);
923  put_bits(&s->pb, 1, 1);
924  put_bits(&s->pb, 6, seconds);
925 
926  put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP));
927  put_bits(&s->pb, 1, 0); // broken link == NO
928 
929  s->last_time_base = time / s->avctx->time_base.den;
930 
931  ff_mpeg4_stuffing(&s->pb);
932 }
933 
935 {
936  int profile_and_level_indication;
937  int vo_ver_id;
938 
939  if (s->avctx->profile != FF_PROFILE_UNKNOWN) {
940  profile_and_level_indication = s->avctx->profile << 4;
941  } else if (s->max_b_frames || s->quarter_sample) {
942  profile_and_level_indication = 0xF0; // adv simple
943  } else {
944  profile_and_level_indication = 0x00; // simple
945  }
946 
947  if (s->avctx->level != FF_LEVEL_UNKNOWN)
948  profile_and_level_indication |= s->avctx->level;
949  else
950  profile_and_level_indication |= 1; // level 1
951 
952  if (profile_and_level_indication >> 4 == 0xF)
953  vo_ver_id = 5;
954  else
955  vo_ver_id = 1;
956 
957  // FIXME levels
958 
959  put_bits(&s->pb, 16, 0);
960  put_bits(&s->pb, 16, VOS_STARTCODE);
961 
962  put_bits(&s->pb, 8, profile_and_level_indication);
963 
964  put_bits(&s->pb, 16, 0);
965  put_bits(&s->pb, 16, VISUAL_OBJ_STARTCODE);
966 
967  put_bits(&s->pb, 1, 1);
968  put_bits(&s->pb, 4, vo_ver_id);
969  put_bits(&s->pb, 3, 1); // priority
970 
971  put_bits(&s->pb, 4, 1); // visual obj type== video obj
972 
973  put_bits(&s->pb, 1, 0); // video signal type == no clue // FIXME
974 
975  ff_mpeg4_stuffing(&s->pb);
976 }
977 
979  int vo_number,
980  int vol_number)
981 {
982  int vo_ver_id;
983 
985  return;
986 
987  if (s->max_b_frames || s->quarter_sample) {
988  vo_ver_id = 5;
990  } else {
991  vo_ver_id = 1;
992  s->vo_type = SIMPLE_VO_TYPE;
993  }
994 
995  put_bits(&s->pb, 16, 0);
996  put_bits(&s->pb, 16, 0x100 + vo_number); /* video obj */
997  put_bits(&s->pb, 16, 0);
998  put_bits(&s->pb, 16, 0x120 + vol_number); /* video obj layer */
999 
1000  put_bits(&s->pb, 1, 0); /* random access vol */
1001  put_bits(&s->pb, 8, s->vo_type); /* video obj type indication */
1002  if (s->workaround_bugs & FF_BUG_MS) {
1003  put_bits(&s->pb, 1, 0); /* is obj layer id= no */
1004  } else {
1005  put_bits(&s->pb, 1, 1); /* is obj layer id= yes */
1006  put_bits(&s->pb, 4, vo_ver_id); /* is obj layer ver id */
1007  put_bits(&s->pb, 3, 1); /* is obj layer priority */
1008  }
1009 
1011 
1012  put_bits(&s->pb, 4, s->aspect_ratio_info); /* aspect ratio info */
1014  put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.num);
1015  put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.den);
1016  }
1017 
1018  if (s->workaround_bugs & FF_BUG_MS) {
1019  put_bits(&s->pb, 1, 0); /* vol control parameters= no @@@ */
1020  } else {
1021  put_bits(&s->pb, 1, 1); /* vol control parameters= yes */
1022  put_bits(&s->pb, 2, 1); /* chroma format YUV 420/YV12 */
1023  put_bits(&s->pb, 1, s->low_delay);
1024  put_bits(&s->pb, 1, 0); /* vbv parameters= no */
1025  }
1026 
1027  put_bits(&s->pb, 2, RECT_SHAPE); /* vol shape= rectangle */
1028  put_bits(&s->pb, 1, 1); /* marker bit */
1029 
1030  put_bits(&s->pb, 16, s->avctx->time_base.den);
1031  if (s->time_increment_bits < 1)
1032  s->time_increment_bits = 1;
1033  put_bits(&s->pb, 1, 1); /* marker bit */
1034  put_bits(&s->pb, 1, 0); /* fixed vop rate=no */
1035  put_bits(&s->pb, 1, 1); /* marker bit */
1036  put_bits(&s->pb, 13, s->width); /* vol width */
1037  put_bits(&s->pb, 1, 1); /* marker bit */
1038  put_bits(&s->pb, 13, s->height); /* vol height */
1039  put_bits(&s->pb, 1, 1); /* marker bit */
1040  put_bits(&s->pb, 1, s->progressive_sequence ? 0 : 1);
1041  put_bits(&s->pb, 1, 1); /* obmc disable */
1042  if (vo_ver_id == 1)
1043  put_bits(&s->pb, 1, 0); /* sprite enable */
1044  else
1045  put_bits(&s->pb, 2, 0); /* sprite enable */
1046 
1047  put_bits(&s->pb, 1, 0); /* not 8 bit == false */
1048  put_bits(&s->pb, 1, s->mpeg_quant); /* quant type= (0=h263 style)*/
1049 
1050  if (s->mpeg_quant) {
1053  }
1054 
1055  if (vo_ver_id != 1)
1056  put_bits(&s->pb, 1, s->quarter_sample);
1057  put_bits(&s->pb, 1, 1); /* complexity estimation disable */
1058  put_bits(&s->pb, 1, s->rtp_mode ? 0 : 1); /* resync marker disable */
1059  put_bits(&s->pb, 1, s->data_partitioning ? 1 : 0);
1060  if (s->data_partitioning)
1061  put_bits(&s->pb, 1, 0); /* no rvlc */
1062 
1063  if (vo_ver_id != 1) {
1064  put_bits(&s->pb, 1, 0); /* newpred */
1065  put_bits(&s->pb, 1, 0); /* reduced res vop */
1066  }
1067  put_bits(&s->pb, 1, 0); /* scalability */
1068 
1069  ff_mpeg4_stuffing(&s->pb);
1070 
1071  /* user data */
1072  if (!(s->flags & CODEC_FLAG_BITEXACT)) {
1073  put_bits(&s->pb, 16, 0);
1074  put_bits(&s->pb, 16, 0x1B2); /* user_data */
1076  }
1077 }
1078 
1079 /* write mpeg4 VOP header */
1081 {
1082  int time_incr;
1083  int time_div, time_mod;
1084 
1085  if (s->pict_type == AV_PICTURE_TYPE_I) {
1086  if (!(s->flags & CODEC_FLAG_GLOBAL_HEADER)) {
1087  if (s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT) // HACK, the reference sw is buggy
1089  if (s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT || picture_number == 0) // HACK, the reference sw is buggy
1090  mpeg4_encode_vol_header(s, 0, 0);
1091  }
1092  if (!(s->workaround_bugs & FF_BUG_MS))
1094  }
1095 
1097 
1098  put_bits(&s->pb, 16, 0); /* vop header */
1099  put_bits(&s->pb, 16, VOP_STARTCODE); /* vop header */
1100  put_bits(&s->pb, 2, s->pict_type - 1); /* pict type: I = 0 , P = 1 */
1101 
1102  assert(s->time >= 0);
1103  time_div = s->time / s->avctx->time_base.den;
1104  time_mod = s->time % s->avctx->time_base.den;
1105  time_incr = time_div - s->last_time_base;
1106  assert(time_incr >= 0);
1107  while (time_incr--)
1108  put_bits(&s->pb, 1, 1);
1109 
1110  put_bits(&s->pb, 1, 0);
1111 
1112  put_bits(&s->pb, 1, 1); /* marker */
1113  put_bits(&s->pb, s->time_increment_bits, time_mod); /* time increment */
1114  put_bits(&s->pb, 1, 1); /* marker */
1115  put_bits(&s->pb, 1, 1); /* vop coded */
1116  if (s->pict_type == AV_PICTURE_TYPE_P) {
1117  put_bits(&s->pb, 1, s->no_rounding); /* rounding type */
1118  }
1119  put_bits(&s->pb, 3, 0); /* intra dc VLC threshold */
1120  if (!s->progressive_sequence) {
1122  put_bits(&s->pb, 1, s->alternate_scan);
1123  }
1124  // FIXME sprite stuff
1125 
1126  put_bits(&s->pb, 5, s->qscale);
1127 
1128  if (s->pict_type != AV_PICTURE_TYPE_I)
1129  put_bits(&s->pb, 3, s->f_code); /* fcode_for */
1130  if (s->pict_type == AV_PICTURE_TYPE_B)
1131  put_bits(&s->pb, 3, s->b_code); /* fcode_back */
1132 }
1133 
1134 static av_cold void init_uni_dc_tab(void)
1135 {
1136  int level, uni_code, uni_len;
1137 
1138  for (level = -256; level < 256; level++) {
1139  int size, v, l;
1140  /* find number of bits */
1141  size = 0;
1142  v = abs(level);
1143  while (v) {
1144  v >>= 1;
1145  size++;
1146  }
1147 
1148  if (level < 0)
1149  l = (-level) ^ ((1 << size) - 1);
1150  else
1151  l = level;
1152 
1153  /* luminance */
1154  uni_code = ff_mpeg4_DCtab_lum[size][0];
1155  uni_len = ff_mpeg4_DCtab_lum[size][1];
1156 
1157  if (size > 0) {
1158  uni_code <<= size;
1159  uni_code |= l;
1160  uni_len += size;
1161  if (size > 8) {
1162  uni_code <<= 1;
1163  uni_code |= 1;
1164  uni_len++;
1165  }
1166  }
1167  uni_DCtab_lum_bits[level + 256] = uni_code;
1168  uni_DCtab_lum_len[level + 256] = uni_len;
1169 
1170  /* chrominance */
1171  uni_code = ff_mpeg4_DCtab_chrom[size][0];
1172  uni_len = ff_mpeg4_DCtab_chrom[size][1];
1173 
1174  if (size > 0) {
1175  uni_code <<= size;
1176  uni_code |= l;
1177  uni_len += size;
1178  if (size > 8) {
1179  uni_code <<= 1;
1180  uni_code |= 1;
1181  uni_len++;
1182  }
1183  }
1184  uni_DCtab_chrom_bits[level + 256] = uni_code;
1185  uni_DCtab_chrom_len[level + 256] = uni_len;
1186  }
1187 }
1188 
1189 static av_cold void init_uni_mpeg4_rl_tab(RLTable *rl, uint32_t *bits_tab,
1190  uint8_t *len_tab)
1191 {
1192  int slevel, run, last;
1193 
1194  assert(MAX_LEVEL >= 64);
1195  assert(MAX_RUN >= 63);
1196 
1197  for (slevel = -64; slevel < 64; slevel++) {
1198  if (slevel == 0)
1199  continue;
1200  for (run = 0; run < 64; run++) {
1201  for (last = 0; last <= 1; last++) {
1202  const int index = UNI_MPEG4_ENC_INDEX(last, run, slevel + 64);
1203  int level = slevel < 0 ? -slevel : slevel;
1204  int sign = slevel < 0 ? 1 : 0;
1205  int bits, len, code;
1206  int level1, run1;
1207 
1208  len_tab[index] = 100;
1209 
1210  /* ESC0 */
1211  code = get_rl_index(rl, last, run, level);
1212  bits = rl->table_vlc[code][0];
1213  len = rl->table_vlc[code][1];
1214  bits = bits * 2 + sign;
1215  len++;
1216 
1217  if (code != rl->n && len < len_tab[index]) {
1218  bits_tab[index] = bits;
1219  len_tab[index] = len;
1220  }
1221  /* ESC1 */
1222  bits = rl->table_vlc[rl->n][0];
1223  len = rl->table_vlc[rl->n][1];
1224  bits = bits * 2;
1225  len++; // esc1
1226  level1 = level - rl->max_level[last][run];
1227  if (level1 > 0) {
1228  code = get_rl_index(rl, last, run, level1);
1229  bits <<= rl->table_vlc[code][1];
1230  len += rl->table_vlc[code][1];
1231  bits += rl->table_vlc[code][0];
1232  bits = bits * 2 + sign;
1233  len++;
1234 
1235  if (code != rl->n && len < len_tab[index]) {
1236  bits_tab[index] = bits;
1237  len_tab[index] = len;
1238  }
1239  }
1240  /* ESC2 */
1241  bits = rl->table_vlc[rl->n][0];
1242  len = rl->table_vlc[rl->n][1];
1243  bits = bits * 4 + 2;
1244  len += 2; // esc2
1245  run1 = run - rl->max_run[last][level] - 1;
1246  if (run1 >= 0) {
1247  code = get_rl_index(rl, last, run1, level);
1248  bits <<= rl->table_vlc[code][1];
1249  len += rl->table_vlc[code][1];
1250  bits += rl->table_vlc[code][0];
1251  bits = bits * 2 + sign;
1252  len++;
1253 
1254  if (code != rl->n && len < len_tab[index]) {
1255  bits_tab[index] = bits;
1256  len_tab[index] = len;
1257  }
1258  }
1259  /* ESC3 */
1260  bits = rl->table_vlc[rl->n][0];
1261  len = rl->table_vlc[rl->n][1];
1262  bits = bits * 4 + 3;
1263  len += 2; // esc3
1264  bits = bits * 2 + last;
1265  len++;
1266  bits = bits * 64 + run;
1267  len += 6;
1268  bits = bits * 2 + 1;
1269  len++; // marker
1270  bits = bits * 4096 + (slevel & 0xfff);
1271  len += 12;
1272  bits = bits * 2 + 1;
1273  len++; // marker
1274 
1275  if (len < len_tab[index]) {
1276  bits_tab[index] = bits;
1277  len_tab[index] = len;
1278  }
1279  }
1280  }
1281  }
1282 }
1283 
1285 {
1286  MpegEncContext *s = avctx->priv_data;
1287  int ret;
1288  static int done = 0;
1289 
1290  if ((ret = ff_mpv_encode_init(avctx)) < 0)
1291  return ret;
1292 
1293  if (!done) {
1294  done = 1;
1295 
1296  init_uni_dc_tab();
1297 
1299 
1302  }
1303 
1304  s->min_qcoeff = -2048;
1305  s->max_qcoeff = 2047;
1311  s->ac_esc_length = 7 + 2 + 1 + 6 + 1 + 12 + 1;
1314 
1315  if (s->flags & CODEC_FLAG_GLOBAL_HEADER) {
1316  s->avctx->extradata = av_malloc(1024);
1317  init_put_bits(&s->pb, s->avctx->extradata, 1024);
1318 
1319  if (!(s->workaround_bugs & FF_BUG_MS))
1321  mpeg4_encode_vol_header(s, 0, 0);
1322 
1323 // ff_mpeg4_stuffing(&s->pb); ?
1324  flush_put_bits(&s->pb);
1325  s->avctx->extradata_size = (put_bits_count(&s->pb) + 7) >> 3;
1326  }
1327  return 0;
1328 }
1329 
1331 {
1332  uint8_t *start = put_bits_ptr(&s->pb);
1333  uint8_t *end = s->pb.buf_end;
1334  int size = end - start;
1335  int pb_size = (((intptr_t)start + size / 3) & (~3)) - (intptr_t)start;
1336  int tex_size = (size - 2 * pb_size) & (~3);
1337 
1338  set_put_bits_buffer_size(&s->pb, pb_size);
1339  init_put_bits(&s->tex_pb, start + pb_size, tex_size);
1340  init_put_bits(&s->pb2, start + pb_size + tex_size, pb_size);
1341 }
1342 
1344 {
1345  const int pb2_len = put_bits_count(&s->pb2);
1346  const int tex_pb_len = put_bits_count(&s->tex_pb);
1347  const int bits = put_bits_count(&s->pb);
1348 
1349  if (s->pict_type == AV_PICTURE_TYPE_I) {
1350  put_bits(&s->pb, 19, DC_MARKER);
1351  s->misc_bits += 19 + pb2_len + bits - s->last_bits;
1352  s->i_tex_bits += tex_pb_len;
1353  } else {
1354  put_bits(&s->pb, 17, MOTION_MARKER);
1355  s->misc_bits += 17 + pb2_len;
1356  s->mv_bits += bits - s->last_bits;
1357  s->p_tex_bits += tex_pb_len;
1358  }
1359 
1360  flush_put_bits(&s->pb2);
1361  flush_put_bits(&s->tex_pb);
1362 
1363  set_put_bits_buffer_size(&s->pb, s->pb2.buf_end - s->pb.buf);
1364  avpriv_copy_bits(&s->pb, s->pb2.buf, pb2_len);
1365  avpriv_copy_bits(&s->pb, s->tex_pb.buf, tex_pb_len);
1366  s->last_bits = put_bits_count(&s->pb);
1367 }
1368 
1370 {
1371  int mb_num_bits = av_log2(s->mb_num - 1) + 1;
1372 
1374  put_bits(&s->pb, 1, 1);
1375 
1376  put_bits(&s->pb, mb_num_bits, s->mb_x + s->mb_y * s->mb_width);
1377  put_bits(&s->pb, s->quant_precision, s->qscale);
1378  put_bits(&s->pb, 1, 0); /* no HEC */
1379 }
1380 
1381 #define OFFSET(x) offsetof(MpegEncContext, x)
1382 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
1383 static const AVOption options[] = {
1384  { "data_partitioning", "Use data partitioning.", OFFSET(data_partitioning), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1385  { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1387  { NULL },
1388 };
1389 
1390 static const AVClass mpeg4enc_class = {
1391  .class_name = "MPEG4 encoder",
1392  .item_name = av_default_item_name,
1393  .option = options,
1394  .version = LIBAVUTIL_VERSION_INT,
1395 };
1396 
1398  .name = "mpeg4",
1399  .long_name = NULL_IF_CONFIG_SMALL("MPEG-4 part 2"),
1400  .type = AVMEDIA_TYPE_VIDEO,
1401  .id = AV_CODEC_ID_MPEG4,
1402  .priv_data_size = sizeof(MpegEncContext),
1403  .init = encode_init,
1404  .encode2 = ff_mpv_encode_picture,
1406  .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
1407  .capabilities = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
1408  .priv_class = &mpeg4enc_class,
1409 };
int last_time_base
Definition: mpegvideo.h:501
static void mpeg4_encode_visual_object_header(MpegEncContext *s)
IDCTDSPContext idsp
Definition: mpegvideo.h:354
void * av_malloc(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:62
int aspect_ratio_info
Definition: mpegvideo.h:515
ScanTable intra_v_scantable
Definition: mpegvideo.h:216
RLTable ff_mpeg4_rl_intra
Definition: mpeg4data.h:109
int size
const uint8_t ff_mpeg4_c_dc_scale_table[32]
Definition: mpeg4data.h:363
int time_increment_bits
< number of bits to represent the fractional part of time (encoder only)
Definition: mpegvideo.h:500
AVOption.
Definition: opt.h:234
#define MV_TYPE_FIELD
2 vectors, one per field
Definition: mpegvideo.h:391
static uint8_t uni_mpeg4_intra_rl_len[64 *64 *2 *2]
Definition: mpeg4videoenc.c:42
const uint8_t * y_dc_scale_table
qscale -> y_dc_scale table
Definition: mpegvideo.h:314
static void mpeg4_encode_block(MpegEncContext *s, int16_t *block, int n, int intra_dc, uint8_t *scan_table, PutBitContext *dc_pb, PutBitContext *ac_pb)
Encode an 8x8 block.
void(* clear_block)(int16_t *block)
Definition: blockdsp.h:35
int last_mv[2][2][2]
last MV, used for MV prediction in MPEG1 & B-frame MPEG4
Definition: mpegvideo.h:400
void ff_clean_mpeg4_qscales(MpegEncContext *s)
modify mb_type & qscale so that encoding is acually possible in mpeg4
#define CODEC_FLAG_PASS1
Use internal 2pass ratecontrol in first pass mode.
Definition: avcodec.h:635
RLTable ff_h263_rl_inter
Definition: h263data.h:162
int16_t(*[3] ac_val)[16]
used for for mpeg4 AC prediction, all 3 arrays must be continuous
Definition: mpegvideo.h:320
static int get_block_rate(MpegEncContext *s, int16_t block[64], int block_last_index, uint8_t scantable[64])
Return the number of bits that encoding the 8x8 block in block would need.
Definition: mpeg4videoenc.c:64
#define FF_COMPLIANCE_VERY_STRICT
Strictly conform to an older more strict version of the spec or reference software.
Definition: avcodec.h:2342
const uint8_t ff_h263_intra_MCBPC_code[9]
Definition: h263data.h:36
#define FF_MPV_COMMON_OPTS
Definition: mpegvideo.h:661
const uint8_t ff_h263_cbpy_tab[16][2]
Definition: h263data.h:85
int num
numerator
Definition: rational.h:44
#define CANDIDATE_MB_TYPE_BIDIR
Definition: mpegutils.h:108
static void skip_put_bits(PutBitContext *s, int n)
Skip the given number of bits.
Definition: put_bits.h:220
void avpriv_copy_bits(PutBitContext *pb, const uint8_t *src, int length)
Copy the content of src to the bitstream.
Definition: bitstream.c:61
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown) That is the width of a pixel divided by the height of the pixel...
Definition: avcodec.h:1429
#define CONFIG_MPEG4_ENCODER
Definition: config.h:958
int min_qcoeff
minimum encodable coefficient
Definition: mpegvideo.h:429
mpegvideo header.
#define FF_ASPECT_EXTENDED
Definition: avcodec.h:1237
static uint32_t uni_mpeg4_intra_rl_bits[64 *64 *2 *2]
Definition: mpeg4videoenc.c:41
#define DC_MARKER
Definition: mpeg4video.h:54
int mpv_flags
flags set by private options
Definition: mpegvideo.h:628
uint8_t permutated[64]
Definition: idctdsp.h:31
uint8_t run
Definition: svq3.c:146
uint8_t * intra_ac_vlc_length
Definition: mpegvideo.h:432
#define UNI_AC_ENC_INDEX(run, level)
Definition: mpegvideo.h:437
int mb_num
number of MBs of a picture
Definition: mpegvideo.h:259
int profile
profile
Definition: avcodec.h:2622
#define FF_LAMBDA_SHIFT
Definition: avutil.h:205
AVCodec.
Definition: avcodec.h:2796
int time_base
time in seconds of last I,P,S Frame
Definition: mpegvideo.h:502
RLTable.
Definition: rl.h:38
int qscale
QP.
Definition: mpegvideo.h:332
int16_t * ff_h263_pred_motion(MpegEncContext *s, int block, int dir, int *px, int *py)
Definition: h263.c:313
static av_cold void init_uni_dc_tab(void)
void ff_mpeg4_encode_picture_header(MpegEncContext *s, int picture_number)
#define INPLACE_OFFSET
Definition: mpegvideo.h:76
int field_select[2][2]
Definition: mpegvideo.h:399
int block_wrap[6]
Definition: mpegvideo.h:416
Macro definitions for various function/variable attributes.
int quant_precision
Definition: mpegvideo.h:513
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avcodec.h:1175
#define FF_BUG_MS
Work around various bugs in Microsoft's broken decoders.
Definition: avcodec.h:2326
#define FF_MPV_FLAG_CBP_RD
Definition: mpegvideo.h:655
#define FF_LEVEL_UNKNOWN
Definition: avcodec.h:2706
void ff_mpeg4_stuffing(PutBitContext *pbc)
add mpeg4 stuffing bits (01...1)
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:38
static uint8_t uni_DCtab_chrom_len[512]
Definition: mpeg4videoenc.c:35
int8_t * max_run[2]
encoding & decoding
Definition: rl.h:46
int64_t time
time of current frame
Definition: mpegvideo.h:503
#define MV_DIRECT
bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4) ...
Definition: mpegvideo.h:386
uint8_t bits
Definition: crc.c:251
uint8_t
#define av_cold
Definition: attributes.h:66
AVOptions.
PutBitContext pb2
used for data partitioned VOPs
Definition: mpegvideo.h:522
const uint8_t ff_h263_intra_MCBPC_bits[9]
Definition: h263data.h:37
#define VOP_STARTCODE
Definition: mpeg4video.h:60
#define CODEC_FLAG_GLOBAL_HEADER
Place global headers in extradata instead of every keyframe.
Definition: avcodec.h:657
static int decide_ac_pred(MpegEncContext *s, int16_t block[6][64], const int dir[6], uint8_t *st[6], int zigzag_last_index[6])
Return the optimal value (0 or 1) for the ac_pred element for the given MB in mpeg4.
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:211
int misc_bits
cbp, mb_type
Definition: mpegvideo.h:468
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1164
int no_rounding
apply no rounding to motion compensation (MPEG4, msmpeg4, ...) for b-frames rounding mode is always 0...
Definition: mpegvideo.h:406
int interlaced_dct
Definition: mpegvideo.h:589
const uint8_t ff_h263_inter_MCBPC_bits[28]
Definition: h263data.h:50
Picture current_picture
copy of the current picture structure.
Definition: mpegvideo.h:306
const uint8_t ff_mpeg4_DCtab_chrom[13][2]
Definition: mpeg4data.h:41
#define RECT_SHAPE
Definition: mpeg4video.h:33
int8_t * max_level[2]
encoding & decoding
Definition: rl.h:45
int flags2
AVCodecContext.flags2.
Definition: mpegvideo.h:239
#define CODEC_FLAG_BITEXACT
Use only bitexact stuff (except (I)DCT).
Definition: avcodec.h:658
int max_qcoeff
maximum encodable coefficient
Definition: mpegvideo.h:430
#define CODEC_FLAG_AC_PRED
H.263 advanced intra coding / MPEG-4 AC prediction.
Definition: avcodec.h:660
static const int dquant_code[5]
#define MAX_LEVEL
Definition: rl.h:35
static uint32_t uni_mpeg4_inter_rl_bits[64 *64 *2 *2]
Definition: mpeg4videoenc.c:43
static int ff_mpeg4_pred_dc(MpegEncContext *s, int n, int level, int *dir_ptr, int encoding)
Predict the dc.
Definition: mpeg4video.h:174
int dquant
qscale difference to prev qscale
Definition: mpegvideo.h:338
#define MOTION_MARKER
Definition: mpeg4video.h:53
#define UNI_MPEG4_ENC_INDEX(last, run, level)
Definition: mpeg4videoenc.c:48
#define ROUNDED_DIV(a, b)
Definition: common.h:51
static void mpeg4_encode_gop_header(MpegEncContext *s)
static int get_bits_diff(MpegEncContext *s)
Definition: mpegvideo.h:770
void ff_mpeg4_init_partitions(MpegEncContext *s)
static uint8_t * put_bits_ptr(PutBitContext *s)
Return the pointer to the byte where the bitstream writer will put the next bit.
Definition: put_bits.h:199
uint8_t * mbskip_table
Definition: mpegvideo.h:113
static void restore_ac_coeffs(MpegEncContext *s, int16_t block[6][64], const int dir[6], uint8_t *st[6], const int zigzag_last_index[6])
Restore the ac coefficients in block that have been changed by decide_ac_pred().
Definition: mpeg4videoenc.c:99
uint8_t * inter_ac_vlc_last_length
Definition: mpegvideo.h:435
void ff_mpeg4_merge_partitions(MpegEncContext *s)
int mb_skipped
MUST BE SET only during DECODING.
Definition: mpegvideo.h:321
#define CODEC_CAP_DELAY
Encoder or decoder requires flushing with NULL input at the end in order to give the complete and cor...
Definition: avcodec.h:713
int strict_std_compliance
strictly follow the std (MPEG4, ...)
Definition: mpegvideo.h:243
int partitioned_frame
is current frame partitioned
Definition: mpegvideo.h:518
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:150
void ff_mpeg4_encode_mb(MpegEncContext *s, int16_t block[6][64], int motion_x, int motion_y)
#define SIMPLE_VO_TYPE
Definition: mpeg4video.h:38
uint8_t * buf
Definition: put_bits.h:38
void ff_mpeg4_init_direct_mv(MpegEncContext *s)
Definition: mpeg4video.c:81
const char * name
Name of the codec implementation.
Definition: avcodec.h:2803
int quarter_sample
1->qpel, 0->half pel ME/MC
Definition: mpegvideo.h:514
uint16_t * mb_type
Table for candidate MB types for encoding (defines in mpegutils.h)
Definition: mpegvideo.h:413
av_const int ff_h263_aspect_to_info(AVRational aspect)
Return the 4 bit value that specifies the given aspect ratio.
Definition: ituh263enc.c:88
static void put_bits(PutBitContext *s, int n, unsigned int value)
Write up to 31 bits into a bitstream.
Definition: put_bits.h:134
int low_delay
no reordering needed / has no b-frames
Definition: mpegvideo.h:519
static av_cold void init_uni_mpeg4_rl_tab(RLTable *rl, uint32_t *bits_tab, uint8_t *len_tab)
static int put_bits_count(PutBitContext *s)
Definition: put_bits.h:67
void ff_clean_h263_qscales(MpegEncContext *s)
modify qscale so that encoding is acually possible in h263 (limit difference to -2..2)
Definition: ituh263enc.c:273
uint8_t * intra_ac_vlc_last_length
Definition: mpegvideo.h:433
#define ADV_SIMPLE_VO_TYPE
Definition: mpeg4video.h:44
const uint8_t ff_mpeg4_DCtab_lum[13][2]
Definition: mpeg4data.h:35
uint8_t ff_mpeg4_static_rl_table_store[3][2][2 *MAX_RUN+MAX_LEVEL+3]
Definition: mpeg4video.c:28
int n
number of entries of table_vlc minus 1
Definition: rl.h:39
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:196
#define FFMIN(a, b)
Definition: common.h:57
const uint8_t ff_mpeg4_y_dc_scale_table[32]
Definition: mpeg4data.h:359
const uint16_t(* table_vlc)[2]
Definition: rl.h:41
Picture new_picture
copy of the source picture structure for encoding.
Definition: mpegvideo.h:300
static uint8_t uni_mpeg4_inter_rl_len[64 *64 *2 *2]
Definition: mpeg4videoenc.c:44
int16_t(*[2] motion_val)[2]
Definition: mpegvideo.h:107
Picture * current_picture_ptr
pointer to the current picture
Definition: mpegvideo.h:310
#define FF_PROFILE_UNKNOWN
Definition: avcodec.h:2623
Picture.
Definition: mpegvideo.h:99
static const AVClass mpeg4enc_class
int alternate_scan
Definition: mpegvideo.h:578
static uint16_t uni_DCtab_lum_bits[512]
Definition: mpeg4videoenc.c:36
int coded_score[8]
Definition: mpegvideo.h:439
static uint16_t uni_DCtab_chrom_bits[512]
Definition: mpeg4videoenc.c:37
static int get_b_cbp(MpegEncContext *s, int16_t block[6][64], int motion_x, int motion_y, int mb_type)
static uint8_t uni_DCtab_lum_len[512]
Definition: mpeg4videoenc.c:34
int level
level
Definition: avcodec.h:2705
int block_last_index[12]
last non zero coefficient in block
Definition: mpegvideo.h:209
uint8_t idct_permutation[64]
IDCT input permutation.
Definition: idctdsp.h:94
const uint8_t ff_h263_inter_MCBPC_code[28]
Definition: h263data.h:41
int ac_esc_length
num of bits needed to encode the longest esc
Definition: mpegvideo.h:431
LIBAVUTIL_VERSION_INT
Definition: eval.c:55
static void set_put_bits_buffer_size(PutBitContext *s, int size)
Change the end of the buffer.
Definition: put_bits.h:232
void ff_write_quant_matrix(PutBitContext *pb, uint16_t *matrix)
int block_index[6]
index to current MB in block based arrays with edges
Definition: mpegvideo.h:415
if(ac->has_optimized_func)
int * mb_index2xy
mb_index -> mb_x + mb_y*mb_stride
Definition: mpegvideo.h:419
#define VE
#define MV_TYPE_16X16
1 vector for the whole mb
Definition: mpegvideo.h:388
NULL
Definition: eval.c:55
#define MV_DIR_BACKWARD
Definition: mpegvideo.h:385
uint8_t * luma_dc_vlc_length
Definition: mpegvideo.h:436
unsigned int lambda2
(lambda*lambda) >> FF_LAMBDA_SHIFT
Definition: mpegvideo.h:335
ptrdiff_t linesize
line size, in bytes, may be different from width
Definition: mpegvideo.h:260
BlockDSPContext bdsp
Definition: mpegvideo.h:351
av_default_item_name
Definition: dnxhdenc.c:52
main external API structure.
Definition: avcodec.h:1050
static void close(AVCodecParserContext *s)
Definition: h264_parser.c:490
ScanTable intra_scantable
Definition: mpegvideo.h:214
int height
picture size. must be a multiple of 16
Definition: mpegvideo.h:223
uint8_t * buf_end
Definition: put_bits.h:38
int ff_mpv_encode_init(AVCodecContext *avctx)
int data_partitioning
data partitioning flag from header
Definition: mpegvideo.h:517
int extradata_size
Definition: avcodec.h:1165
uint8_t * inter_ac_vlc_length
Definition: mpegvideo.h:434
int progressive_sequence
Definition: mpegvideo.h:566
uint16_t * intra_matrix
custom intra quantization matrix
Definition: avcodec.h:1591
Describe the class of an AVClass context structure.
Definition: log.h:33
ScanTable intra_h_scantable
Definition: mpegvideo.h:215
int index
Definition: gxfenc.c:72
#define CANDIDATE_MB_TYPE_DIRECT
Definition: mpegutils.h:105
static av_cold int encode_init(AVCodecContext *avctx)
struct AVFrame * f
Definition: mpegvideo.h:100
static int mpeg4_get_block_length(MpegEncContext *s, int16_t *block, int n, int intra_dc, uint8_t *scan_table)
static void ff_h263_encode_motion_vector(MpegEncContext *s, int x, int y, int f_code)
Definition: h263.h:145
int f_code
forward MV resolution
Definition: mpegvideo.h:362
#define CODEC_FLAG_CLOSED_GOP
Definition: avcodec.h:663
uint16_t * inter_matrix
custom inter quantization matrix
Definition: avcodec.h:1598
#define MV_DIR_FORWARD
Definition: mpegvideo.h:384
int max_b_frames
max number of b-frames for encoding
Definition: mpegvideo.h:240
int pict_type
AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
Definition: mpegvideo.h:339
int ff_mpeg4_get_video_packet_prefix_length(MpegEncContext *s)
Definition: mpeg4video.c:30
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:141
const uint8_t * c_dc_scale_table
qscale -> c_dc_scale table
Definition: mpegvideo.h:315
uint8_t level
Definition: svq3.c:147
me_cmp_func sad[6]
Definition: me_cmp.h:41
int mv[2][4][2]
motion vectors for a macroblock first coordinate : 0 = forward 1 = backward second " : depend...
Definition: mpegvideo.h:398
MpegEncContext.
Definition: mpegvideo.h:204
int8_t * qscale_table
Definition: mpegvideo.h:104
#define MAX_RUN
Definition: rl.h:34
struct AVCodecContext * avctx
Definition: mpegvideo.h:221
PutBitContext pb
bit output
Definition: mpegvideo.h:277
#define VISUAL_OBJ_STARTCODE
Definition: mpeg4video.h:59
MECmpContext mecc
Definition: mpegvideo.h:355
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:65
#define CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: avcodec.h:759
int mb_stride
mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11 ...
Definition: mpegvideo.h:256
static void flush_put_bits(PutBitContext *s)
Pad the end of the output stream with zeros.
Definition: put_bits.h:83
#define CODEC_FLAG2_NO_OUTPUT
Skip bitstream encoding.
Definition: avcodec.h:665
int shared
Definition: mpegvideo.h:142
Bi-dir predicted.
Definition: avutil.h:255
static const AVOption options[]
static void init_put_bits(PutBitContext *s, uint8_t *buffer, int buffer_size)
Initialize the PutBitContext s.
Definition: put_bits.h:48
int den
denominator
Definition: rational.h:45
int ff_mpv_encode_end(AVCodecContext *avctx)
static av_cold int init(AVCodecParserContext *s)
Definition: h264_parser.c:499
static int get_rl_index(const RLTable *rl, int last, int run, int level)
Definition: rl.h:75
void ff_mpeg4_encode_video_packet_header(MpegEncContext *s)
void * priv_data
Definition: avcodec.h:1092
int last_bits
temp var used for calculating the above vars
Definition: mpegvideo.h:469
int top_field_first
If the content is interlaced, is top field displayed first.
Definition: frame.h:325
int len
#define av_log2
Definition: intmath.h:85
av_cold void ff_init_rl(RLTable *rl, uint8_t static_store[2][2 *MAX_RUN+MAX_LEVEL+3])
Definition: mpegvideo.c:1528
int16_t(* block)[64]
points to one of the following blocks
Definition: mpegvideo.h:600
PutBitContext tex_pb
used for data partitioned VOPs
Definition: mpegvideo.h:521
Picture next_picture
copy of the next picture structure.
Definition: mpegvideo.h:294
static int get_p_cbp(MpegEncContext *s, int16_t block[6][64], int motion_x, int motion_y)
Definition: h263.h:156
Picture ** reordered_input_picture
pointer to the next pictures in codedorder for encoding
Definition: mpegvideo.h:264
#define LIBAVCODEC_IDENT
Definition: version.h:43
void avpriv_put_string(PutBitContext *pb, const char *string, int terminate_string)
Put the string string in the bitstream.
Definition: bitstream.c:50
int flags
AVCodecContext.flags (HQ, MV4, ...)
Definition: mpegvideo.h:238
int workaround_bugs
workaround bugs in encoders which cannot be detected automatically
Definition: mpegvideo.h:244
static int mpeg4_get_dc_length(int level, int n)
void ff_set_mpeg4_time(MpegEncContext *s)
static void mpeg4_encode_blocks(MpegEncContext *s, int16_t block[6][64], int intra_dc[6], uint8_t **scan_table, PutBitContext *dc_pb, PutBitContext *ac_pb)
#define MV_TYPE_8X8
4 vectors (h263, mpeg4 4MV)
Definition: mpegvideo.h:389
int b_code
backward MV resolution for B Frames (mpeg4)
Definition: mpegvideo.h:363
int ff_mpv_encode_picture(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame, int *got_packet)
static void mpeg4_encode_dc(PutBitContext *s, int level, int n)
Encode the dc value.
AVPixelFormat
Pixel format.
Definition: pixfmt.h:63
static void mpeg4_encode_vol_header(MpegEncContext *s, int vo_number, int vol_number)
#define OFFSET(x)
AVCodec ff_mpeg4_encoder
Predicted.
Definition: avutil.h:254
#define GOP_STARTCODE
Definition: mpeg4video.h:58
#define VOS_STARTCODE
Definition: mpeg4video.h:56
static int16_t block[64]
Definition: dct-test.c:88